[Cmake] cmake seems to crash because 0x0 is used in place of ""

[Bill Hoffman]

Thanks for the report, I think I have checked in a fix.


At 07:35 PM 1/17/2002 -0500, Wheeler, Fred (CRD) wrote:
>I'm getting cmake to core dump.  I hope this report helps.  My guess
>is that def is being set to 0 in cmIfCommand.cxx, but that should be
>interpreted as an empty string.  I can fix the problem in Solaris with
>"export LD_PRELOAD=0 at 0.so.1" which puts an empty string \0 at memory
>location 0x0 to solve such problems.
>
>Below is some output from gdb.
>
>Fred Wheeler
>
>0% gdb $SR_CMAKE core
>GNU gdb 5.1
>Copyright 2001 Free Software Foundation, Inc.
>GDB is free software, covered by the GNU General Public License, and you are
>welcome to change it and/or distribute copies of it under certain conditions.
>Type "show copying" to see the conditions.
>There is absolutely no warranty for GDB.  Type "show warranty" for details.
>This GDB was configured as "sparc-sun-solaris2.7"...
>Core was generated by `/no_backup/wheeler/prj/sr/cmake_usr/bin/cmake
>/no_backup/wheeler/prj/sr/vxl_src'.
>Program terminated with signal 11, Segmentation fault.
>Reading symbols from /home/wheeler/usr/local/sparc-sun-solaris2.7/lib/libstdc++.so.3...done.
>Loaded symbols for /home/wheeler/usr/local/sparc-sun-solaris2.7/lib/libstdc++.so.3
>Reading symbols from /usr/lib/libm.so.1...done.
>Loaded symbols for /usr/lib/libm.so.1
>Reading symbols from /home/wheeler/usr/local/sparc-sun-solaris2.7/lib/libgcc_s.so.1...done.
>Loaded symbols for /home/wheeler/usr/local/sparc-sun-solaris2.7/lib/libgcc_s.so.1
>Reading symbols from /usr/lib/libc.so.1...done.
>Loaded symbols for /usr/lib/libc.so.1
>Reading symbols from /usr/lib/libdl.so.1...done.
>Loaded symbols for /usr/lib/libdl.so.1
>Reading symbols from /usr/platform/SUNW,Sun-Blade-1000/lib/libc_psr.so.1...
>done.
>Loaded symbols for /usr/platform/SUNW,Sun-Blade-1000/lib/libc_psr.so.1
>#0  0xff1ce5b0 in ?? ()
>(gdb) where
>#0  0xff1ce5b0 in ?? ()
>#1  0x0005dcb8 in cmIfCommand::InitialPass(std::vector<std::string, std::allocator<std::string> >
>const&) (this=0x1aa578, args=@0x19290c)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmIfCommand.cxx:173
>#2  0x00038a64 in cmMakefile::ExecuteCommand(std::string&, std::vector<std::string,
>std::allocator<std::string> > const&) (this=0x19b948, name=@0x192908, 
>    arguments=@0x19290c)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmMakefile.cxx:238
>#3  0x00038e94 in cmMakefile::ReadListFile(char const*, char const*) (
>    this=0x19b948, 
>    filename=0x175e1c "/no_backup/wheeler/prj/sr/vxl_src/CMakeLists.txt", 
>    external=0x19290c "")
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmMakefile.cxx:350
>#4  0x0005e4a0 in cmIncludeCommand::InitialPass(std::vector<std::string, std::allocator<std::string>
>> const&) (this=0x1aa548, argsIn=@0xffbee2cc)
>    at
>/home/wheeler/usr/local/sparc-sun-solaris2.7/lib/gcc-lib/../../../include/g++-v3/bits/basic_string.h:
>208
>#5  0x00038a64 in cmMakefile::ExecuteCommand(std::string&, std::vector<std::string,
>std::allocator<std::string> > const&) (this=0x19b948, name=@0x1a77b0, 
>    arguments=@0x1a77b4)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmMakefile.cxx:238
>#6  0x00038e94 in cmMakefile::ReadListFile(char const*, char const*) (
>    this=0x19b948, 
>    filename=0x175dcc "/no_backup/wheeler/prj/sr/vxl_src/vxl/vul/io/tests/CMakeLists.txt",
>external=0x1a77b4 "")
>---Type <return> to continue, or q <return> to quit---
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmMakefile.cxx:350
>#7  0x0003f480 in cmMakefile::FindSubDirectoryCMakeListsFiles(std::vector<cmMakefile*,
>std::allocator<cmMakefile*> >&) (this=0x19a538, makefiles=@0xffbee788)
>    at
>/home/wheeler/usr/local/sparc-sun-solaris2.7/lib/gcc-lib/../../../include/g++-v3/bits/basic_string.h:
>714
>#8  0x0003f48c in cmMakefile::FindSubDirectoryCMakeListsFiles(std::vector<cmMakefile*,
>std::allocator<cmMakefile*> >&) (this=0x199610, makefiles=@0xffbee788)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmMakefile.cxx:1137
>#9  0x0003f48c in cmMakefile::FindSubDirectoryCMakeListsFiles(std::vector<cmMakefile*,
>std::allocator<cmMakefile*> >&) (this=0x1885d8, makefiles=@0xffbee788)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmMakefile.cxx:1137
>#10 0x0003f48c in cmMakefile::FindSubDirectoryCMakeListsFiles(std::vector<cmMakefile*,
>std::allocator<cmMakefile*> >&) (this=0xffbeea20, makefiles=@0xffbee788)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmMakefile.cxx:1137
>#11 0x00092914 in cmUnixMakefileGenerator::RecursiveGenerateCacheOnly() (
>    this=0x130238)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmUnixMakefileGenerator.cxx:1333
>#12 0x0008733c in cmUnixMakefileGenerator::GenerateMakefile() (this=0x130238)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmUnixMakefileGenerator.cxx:115
>#13 0x0003972c in cmMakefile::GenerateMakefile() (this=0xffbeea20)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmMakefile.cxx:437
>#14 0x00034060 in cmake::Generate(std::vector<std::string, std::allocator<std::string> > const&,
>bool) (this=0xffbeebb8, args=@0xffbeebc0, buildMakefiles=true)
>---Type <return> to continue, or q <return> to quit---
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmake.cxx:424
>#15 0x00030f50 in main (ac=2, av=0xffbeec44)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmakemain.cxx:23
>(gdb) up
>#1  0x0005dcb8 in cmIfCommand::InitialPass(std::vector<std::string, std::allocator<std::string> >
>const&) (this=0x1aa578, args=@0x19290c)
>    at /no_backup/wheeler/prj/sr/cmake_src/Source/cmIfCommand.cxx:173
>173         if (!regEntry.find(def))
>(gdb) print def
>$1 = 0x0
>
>
>--
>Fred Wheeler, GE CRD, KWC-303
>Phone: 518-387-7225 (GE Internal Dialcom: 8*833-7225)
>Fax:   518-387-4042 (GE Internal Dialcom: 8*833-4042)
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